LOCTITE 55 Pipe Thread Sealant, Non Curing Thread Sealant for Plumbing Pipes and Fittings, Reliable Fast Action Pipe Sealant for Metal and Plastic, 50m

I wish I had discovered this thread sealing cord earlier. It works very well and is easy to use. Unfortunately, the sticker Amazon places for their stock code obscures the usage guidance, so be careful to refer to the website if you can't peel it off successfully. The key is using the correct number of turns related to your pipe diameter, and in winding each turn across the thread rather than within the thread. I just knew it was going to work as I tightened each joint - a smooth resistance, which became higher as the end of the tightening approached. I particularly like the way a sealed joint can be re- orientated (for example, to align a tap) after assembly without losing watertightness. If you need to remove a joint, it's easier to clean the threads of this cord compared to PTFE tape, or sealing gunk. It's an updated version of the old plumbers' standby, hemp fibre. You get a lot of cord in the dispenser for the money, so I consider it decent value for money. Switch to this and you'll never go back to PTFE tape.

Much better than PTFE tape for threaded joints. Radiator valves, garden tap fittings etc all fit better, tighter and neater with this stuff.

This product does exactly what it needs to do - it seals threads easily and effectively and allows for an interference fit on items such as outdoor taps where orientation is important. Much better than PTFE tape.

Reviewed May 2023: Bought this after a recommendation from a YouTube channel on the best ways to ensure compression joints are totally sealed and he was using this stuff. Although regular PTFE is pretty cheap for a roll, its usually for 12 metres or so. (thats still a lot of pipes that can be sealed!). This loctite cord is 50 metres, I'm thinking this will probably last me the rest of my lifetime if I don't loose it. This is cord, not flat tape.. one lesson as that its not necessary to have tape flat (how much time and frustration has been spent in the past!). In the case of compression fittings, its a case of winding about 7 turns on the pipe below the olive (once the olive is in place from an initial tightening). Then, when tightening up, the cord is compressed under the screw fitting and against the olive. Its very tidy, with no cord/tape on show, and I had a 100% first time success rate of zero leaks! The casing has a cutter, which is helpful because it means you can cut it off one handed, and its red in colour which helps when trying to find it after putting it down. I'd buy this again if I run out or loose this reel.

Shockingly good, will never use ptfe tape again

Excellent stuff. I had been trying to seal a multude of leaks on my garden system and another on an inside pipe. Tried the usual PTFE thread seal tape which until now has always been my stand by and done the job.( many years ago I worked in the factory where this was made by the millions) when I received the Loctite I must admit I was sceptical it looked like string and I couldn’t see how it would seal a thread. Take the time to read the instructions and follow them . It was brilliant. Not a leak since.

I have been using this for 20 years. Way better than PTFE. PTFE is fine for wrapping around olives on compression fittings. But if you need to wrap a thread particularly on a tapered thread such as a garden tap then this is the ONLY product to use. You can pack just enough to enable the fitting to be tightened to the EXACT spot you need to line up the fitting. It’s a modern version of hemp & paste which only the very old plumbers will have heard of 😂 A must for your tool bag. DIYers will use it once in a blue moon but it should always be there. Professional plumbers not using it are missing out on a critical product for their trade!

I came across this by accident after years of using PTFE tape and cursing how it got tangled or broke. Loctite string is absolutely brilliant. Very easy to use and super reliable.